Why does my Audi lose power on the highway?

I've noticed that whenever I go over 50 mph on the highway, my Audi starts to lose power. It feels like the engine is struggling. What could be causing this and how can I fix it?

One possible reason for your Audi losing power on the highway could be a clogged fuel filter. When the filter gets clogged, it restricts the flow of fuel to the engine, causing it to struggle. You can try replacing the fuel filter to see if it improves the performance.

Another reason could be a faulty oxygen sensor. This sensor measures the amount of oxygen in the exhaust and helps regulate the fuel-to-air ratio. If it's not functioning properly, it can cause your Audi to lose power at higher speeds. I suggest getting it checked by a mechanic and replaced if necessary.